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36#include <linux/types.h>
37#include <linux/slab.h>
38#include <linux/module.h>
39#include <linux/oid_registry.h>
40#include <linux/sunrpc/msg_prot.h>
41#include <linux/sunrpc/gss_asn1.h>
42#include <linux/sunrpc/auth_gss.h>
43#include <linux/sunrpc/svcauth_gss.h>
44#include <linux/sunrpc/gss_err.h>
45#include <linux/sunrpc/sched.h>
46#include <linux/sunrpc/gss_api.h>
47#include <linux/sunrpc/clnt.h>
48
49#ifdef RPC_DEBUG
50# define RPCDBG_FACILITY RPCDBG_AUTH
51#endif
52
53static LIST_HEAD(registered_mechs);
54static DEFINE_SPINLOCK(registered_mechs_lock);
55
56static void
57gss_mech_free(struct gss_api_mech *gm)
58{
59 struct pf_desc *pf;
60 int i;
61
62 for (i = 0; i < gm->gm_pf_num; i++) {
63 pf = &gm->gm_pfs[i];
64 kfree(pf->auth_domain_name);
65 pf->auth_domain_name = NULL;
66 }
67}
68
69static inline char *
70make_auth_domain_name(char *name)
71{
72 static char *prefix = "gss/";
73 char *new;
74
75 new = kmalloc(strlen(name) + strlen(prefix) + 1, GFP_KERNEL);
76 if (new) {
77 strcpy(new, prefix);
78 strcat(new, name);
79 }
80 return new;
81}
82
83static int
84gss_mech_svc_setup(struct gss_api_mech *gm)
85{
86 struct pf_desc *pf;
87 int i, status;
88
89 for (i = 0; i < gm->gm_pf_num; i++) {
90 pf = &gm->gm_pfs[i];
91 pf->auth_domain_name = make_auth_domain_name(pf->name);
92 status = -ENOMEM;
93 if (pf->auth_domain_name == NULL)
94 goto out;
95 status = svcauth_gss_register_pseudoflavor(pf->pseudoflavor,
96 pf->auth_domain_name);
97 if (status)
98 goto out;
99 }
100 return 0;
101out:
102 gss_mech_free(gm);
103 return status;
104}
105
106
107
108
109
110
111
112int gss_mech_register(struct gss_api_mech *gm)
113{
114 int status;
115
116 status = gss_mech_svc_setup(gm);
117 if (status)
118 return status;
119 spin_lock(®istered_mechs_lock);
120 list_add(&gm->gm_list, ®istered_mechs);
121 spin_unlock(®istered_mechs_lock);
122 dprintk("RPC: registered gss mechanism %s\n", gm->gm_name);
123 return 0;
124}
125EXPORT_SYMBOL_GPL(gss_mech_register);
126
127
128
129
130
131
132void gss_mech_unregister(struct gss_api_mech *gm)
133{
134 spin_lock(®istered_mechs_lock);
135 list_del(&gm->gm_list);
136 spin_unlock(®istered_mechs_lock);
137 dprintk("RPC: unregistered gss mechanism %s\n", gm->gm_name);
138 gss_mech_free(gm);
139}
140EXPORT_SYMBOL_GPL(gss_mech_unregister);
141
142struct gss_api_mech *gss_mech_get(struct gss_api_mech *gm)
143{
144 __module_get(gm->gm_owner);
145 return gm;
146}
147EXPORT_SYMBOL(gss_mech_get);
148
149static struct gss_api_mech *
150_gss_mech_get_by_name(const char *name)
151{
152 struct gss_api_mech *pos, *gm = NULL;
153
154 spin_lock(®istered_mechs_lock);
155 list_for_each_entry(pos, ®istered_mechs, gm_list) {
156 if (0 == strcmp(name, pos->gm_name)) {
157 if (try_module_get(pos->gm_owner))
158 gm = pos;
159 break;
160 }
161 }
162 spin_unlock(®istered_mechs_lock);
163 return gm;
164
165}
166
167struct gss_api_mech * gss_mech_get_by_name(const char *name)
168{
169 struct gss_api_mech *gm = NULL;
170
171 gm = _gss_mech_get_by_name(name);
172 if (!gm) {
173 request_module("rpc-auth-gss-%s", name);
174 gm = _gss_mech_get_by_name(name);
175 }
176 return gm;
177}
178
179struct gss_api_mech *gss_mech_get_by_OID(struct rpcsec_gss_oid *obj)
180{
181 struct gss_api_mech *pos, *gm = NULL;
182 char buf[32];
183
184 if (sprint_oid(obj->data, obj->len, buf, sizeof(buf)) < 0)
185 return NULL;
186 dprintk("RPC: %s(%s)\n", __func__, buf);
187 request_module("rpc-auth-gss-%s", buf);
188
189 spin_lock(®istered_mechs_lock);
190 list_for_each_entry(pos, ®istered_mechs, gm_list) {
191 if (obj->len == pos->gm_oid.len) {
192 if (0 == memcmp(obj->data, pos->gm_oid.data, obj->len)) {
193 if (try_module_get(pos->gm_owner))
194 gm = pos;
195 break;
196 }
197 }
198 }
199 spin_unlock(®istered_mechs_lock);
200 return gm;
201}
202
203static inline int
204mech_supports_pseudoflavor(struct gss_api_mech *gm, u32 pseudoflavor)
205{
206 int i;
207
208 for (i = 0; i < gm->gm_pf_num; i++) {
209 if (gm->gm_pfs[i].pseudoflavor == pseudoflavor)
210 return 1;
211 }
212 return 0;
213}
214
215static struct gss_api_mech *_gss_mech_get_by_pseudoflavor(u32 pseudoflavor)
216{
217 struct gss_api_mech *gm = NULL, *pos;
218
219 spin_lock(®istered_mechs_lock);
220 list_for_each_entry(pos, ®istered_mechs, gm_list) {
221 if (!mech_supports_pseudoflavor(pos, pseudoflavor)) {
222 module_put(pos->gm_owner);
223 continue;
224 }
225 if (try_module_get(pos->gm_owner))
226 gm = pos;
227 break;
228 }
229 spin_unlock(®istered_mechs_lock);
230 return gm;
231}
232
233struct gss_api_mech *
234gss_mech_get_by_pseudoflavor(u32 pseudoflavor)
235{
236 struct gss_api_mech *gm;
237
238 gm = _gss_mech_get_by_pseudoflavor(pseudoflavor);
239
240 if (!gm) {
241 request_module("rpc-auth-gss-%u", pseudoflavor);
242 gm = _gss_mech_get_by_pseudoflavor(pseudoflavor);
243 }
244 return gm;
245}
246
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255
256
257int gss_mech_list_pseudoflavors(rpc_authflavor_t *array_ptr, int size)
258{
259 struct gss_api_mech *pos = NULL;
260 int j, i = 0;
261
262 spin_lock(®istered_mechs_lock);
263 list_for_each_entry(pos, ®istered_mechs, gm_list) {
264 for (j = 0; j < pos->gm_pf_num; j++) {
265 if (i >= size) {
266 spin_unlock(®istered_mechs_lock);
267 return -ENOMEM;
268 }
269 array_ptr[i++] = pos->gm_pfs[j].pseudoflavor;
270 }
271 }
272 spin_unlock(®istered_mechs_lock);
273 return i;
274}
275
276
277
278
279
280
281
282
283
284rpc_authflavor_t gss_svc_to_pseudoflavor(struct gss_api_mech *gm, u32 qop,
285 u32 service)
286{
287 int i;
288
289 for (i = 0; i < gm->gm_pf_num; i++) {
290 if (gm->gm_pfs[i].qop == qop &&
291 gm->gm_pfs[i].service == service) {
292 return gm->gm_pfs[i].pseudoflavor;
293 }
294 }
295 return RPC_AUTH_MAXFLAVOR;
296}
297
298
299
300
301
302
303
304
305rpc_authflavor_t gss_mech_info2flavor(struct rpcsec_gss_info *info)
306{
307 rpc_authflavor_t pseudoflavor;
308 struct gss_api_mech *gm;
309
310 gm = gss_mech_get_by_OID(&info->oid);
311 if (gm == NULL)
312 return RPC_AUTH_MAXFLAVOR;
313
314 pseudoflavor = gss_svc_to_pseudoflavor(gm, info->qop, info->service);
315
316 gss_mech_put(gm);
317 return pseudoflavor;
318}
319
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324
325
326
327
328int gss_mech_flavor2info(rpc_authflavor_t pseudoflavor,
329 struct rpcsec_gss_info *info)
330{
331 struct gss_api_mech *gm;
332 int i;
333
334 gm = gss_mech_get_by_pseudoflavor(pseudoflavor);
335 if (gm == NULL)
336 return -ENOENT;
337
338 for (i = 0; i < gm->gm_pf_num; i++) {
339 if (gm->gm_pfs[i].pseudoflavor == pseudoflavor) {
340 memcpy(info->oid.data, gm->gm_oid.data, gm->gm_oid.len);
341 info->oid.len = gm->gm_oid.len;
342 info->qop = gm->gm_pfs[i].qop;
343 info->service = gm->gm_pfs[i].service;
344 gss_mech_put(gm);
345 return 0;
346 }
347 }
348
349 gss_mech_put(gm);
350 return -ENOENT;
351}
352
353u32
354gss_pseudoflavor_to_service(struct gss_api_mech *gm, u32 pseudoflavor)
355{
356 int i;
357
358 for (i = 0; i < gm->gm_pf_num; i++) {
359 if (gm->gm_pfs[i].pseudoflavor == pseudoflavor)
360 return gm->gm_pfs[i].service;
361 }
362 return 0;
363}
364EXPORT_SYMBOL(gss_pseudoflavor_to_service);
365
366char *
367gss_service_to_auth_domain_name(struct gss_api_mech *gm, u32 service)
368{
369 int i;
370
371 for (i = 0; i < gm->gm_pf_num; i++) {
372 if (gm->gm_pfs[i].service == service)
373 return gm->gm_pfs[i].auth_domain_name;
374 }
375 return NULL;
376}
377
378void
379gss_mech_put(struct gss_api_mech * gm)
380{
381 if (gm)
382 module_put(gm->gm_owner);
383}
384EXPORT_SYMBOL(gss_mech_put);
385
386
387
388int
389gss_import_sec_context(const void *input_token, size_t bufsize,
390 struct gss_api_mech *mech,
391 struct gss_ctx **ctx_id,
392 time_t *endtime,
393 gfp_t gfp_mask)
394{
395 if (!(*ctx_id = kzalloc(sizeof(**ctx_id), gfp_mask)))
396 return -ENOMEM;
397 (*ctx_id)->mech_type = gss_mech_get(mech);
398
399 return mech->gm_ops->gss_import_sec_context(input_token, bufsize,
400 *ctx_id, endtime, gfp_mask);
401}
402
403
404
405u32
406gss_get_mic(struct gss_ctx *context_handle,
407 struct xdr_buf *message,
408 struct xdr_netobj *mic_token)
409{
410 return context_handle->mech_type->gm_ops
411 ->gss_get_mic(context_handle,
412 message,
413 mic_token);
414}
415
416
417
418u32
419gss_verify_mic(struct gss_ctx *context_handle,
420 struct xdr_buf *message,
421 struct xdr_netobj *mic_token)
422{
423 return context_handle->mech_type->gm_ops
424 ->gss_verify_mic(context_handle,
425 message,
426 mic_token);
427}
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442
443u32
444gss_wrap(struct gss_ctx *ctx_id,
445 int offset,
446 struct xdr_buf *buf,
447 struct page **inpages)
448{
449 return ctx_id->mech_type->gm_ops
450 ->gss_wrap(ctx_id, offset, buf, inpages);
451}
452
453u32
454gss_unwrap(struct gss_ctx *ctx_id,
455 int offset,
456 struct xdr_buf *buf)
457{
458 return ctx_id->mech_type->gm_ops
459 ->gss_unwrap(ctx_id, offset, buf);
460}
461
462
463
464
465
466
467u32
468gss_delete_sec_context(struct gss_ctx **context_handle)
469{
470 dprintk("RPC: gss_delete_sec_context deleting %p\n",
471 *context_handle);
472
473 if (!*context_handle)
474 return GSS_S_NO_CONTEXT;
475 if ((*context_handle)->internal_ctx_id)
476 (*context_handle)->mech_type->gm_ops
477 ->gss_delete_sec_context((*context_handle)
478 ->internal_ctx_id);
479 gss_mech_put((*context_handle)->mech_type);
480 kfree(*context_handle);
481 *context_handle=NULL;
482 return GSS_S_COMPLETE;
483}
484